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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] Created: (MATH-401) Policy concerning "null"
Date Thu, 05 Aug 2010 10:23:16 GMT
Policy concerning "null"
------------------------

                 Key: MATH-401
                 URL: https://issues.apache.org/jira/browse/MATH-401
             Project: Commons Math
          Issue Type: Improvement
            Reporter: Gilles
            Assignee: Gilles
            Priority: Trivial
             Fix For: 3.0


Following the discussion on the "dev" ML, it appears that it would be fine to not check for
{{null}} references within CM. The JVM will do it anyway so that it is redundant and not necessary
most of the time (i.e. when usage is valid). When it happens, the problem is obvious enough
that the standard {{NullPointerException}} fully describes it, without the need for additional
specific and localized detailed messages.
Hence we could remove all explicit checks for {{null}}. Or when early failure is preferred,
make the check and throw {{NullPointerException}} (without a message argument).
Since failed checks are currently reported with an {{IllegalArgumentException}}, the change
is not backward-compatible.

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